How to update Entity with the same position of cam?

CesiumJS
1

Hi guys, iam trying to put a new model (glft) with the same position and rotation of camera, but when i use the listener for cameras, i receive the position Cartesian3 (and not found any rotation parameter)

But the model need to pass position Cartesian3.fromDegress and orientation HeadingPitchRoll.

How i convert the camera position&rotation to model position&orientation?

// Create Entity Model
    const scale: 6;
    const height: 1;
    const lat = -43.1918484;
    const long = -22.8943629;
    const position = Cartesian3.fromDegrees(
      lat,
      long,
      height,
    );

    const heading = CesiumMath.toRadians(0);
    const pitch = 0;
    const roll = 0;
    const rotation = new HeadingPitchRoll(heading, pitch, roll);

    const orientation = Transforms.headingPitchRollQuaternion(
      position,
      rotation,
    );

    const uri: string = AvatarsConstants.DEFAULT_AVATAR_URL;

    const avatarModel: Entity = viewer.entities.add({
      name: 'name',
      position,
      orientation,
      model: {
        scale,
        uri
      },
    });

// Get the position of camera
viewer.camera.changed.addEventListener(() => {
 const { position } = viewer.camera;
})